Parenting a Puppet Pin

I have built a character rig that is just comprised of parented Solids. The character's tail is parented to the body and the tip of the tail is parented to the tail. I am planing on making the solids invisible and adding an expretion to puppet pins on a different visible tail layer so that the pins will fallow the parented solids.

is there a way to do this?

i am getting stuck because the parented objects location doesn't "change"

Is there a way to tell the pin the location in the comp of the solid?

Thanks